SpringBoot如何获取Get请求参数详解

@RestController
public class HelloController {
    @GetMapping("/hello/{name}")
    public String hello(@PathVariable("name") String name){
 
        return "你好，" + name + " !";
    }
}

@RestController
public class HelloController {
    @GetMapping("/hello")
    public String hello(@RequestParam("name") String name){
 
        return "你好，" + name + " !";
    }
}

@RestController
public class HelloController {
    @GetMapping("/hello")
    public String hello(@RequestParam Map<String, Object> map){
 
        return "图书: " + map.get("name") +  " 的作者为: " + map.get("author");
    }
}

@RestController
public class HelloController {
 
    @GetMapping("/array")
    public String array(@RequestParam("name") String[] names){
 
        System.out.println("我是数组接收的参数：" + Arrays.toString(names));
 
        return "我是数组接收的参数：" + Arrays.toString(names);
    }
 
    @GetMapping("/list")
    public String list(@RequestParam("name")List<String> names){
        System.out.println("我是List接收的参数：" + names);
        return "我是List接收的参数：" + names.toString();
    }
 
}

public class Book {
    private String name;
    private String author;
    private Double price;
   // 省略 getter setter 方法
}

@RestController
public class BookController {
    @GetMapping("/book")
    public Book book(Book book){
        System.out.println("接收到的参数为：" + book);
        return  book;
    }
}

public class User {
    private String username;
    private String password;
    // 省略 getter setter 方法
}

@RestController
public class BookController {
    @GetMapping("/book")
    public Book book(Book book, User user){
        System.out.println("接收到的参数为：" + book);
        System.out.println("接收到的参数为：" + user);
        return  book;
    }
}

public class Book {
    private String name;
    private String author;
}
 
 
public class Author {
    private String name;
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    @Override
    public String toString() {
        return "Author{" +
                "name='" + name + '\'' +
                '}';
    }
}

@RestController
public class BookController {
    @GetMapping("/book")
    public Book book(@ModelAttribute("b") Book book, @ModelAttribute("a") Author author){
        System.out.println("接收到的参数为：" + book);
        System.out.println("接收到的参数为：" + author);
        return  book;
    }
 
    // 添加  InitBinder 指定 前缀 b
    @InitBinder("b")
    private void initBinderB(WebDataBinder binder) {
        binder.setFieldDefaultPrefix("b.");
    }
 
    // 添加  InitBinder 指定 前缀 a
    @InitBinder("a")
    private void initBinderA(WebDataBinder binder) {
        binder.setFieldDefaultPrefix("a.");
    }
}